Exotic ηπ state in (p)over-bar-d annihilation at rest into π-π0η pspectator

被引：221

作者：

Abele, A ^{[1
]}

Adomeit, J

Amsler, C

Baker, CA

Barnett, BM

Batty, CJ

Benayoun, M

Berdoz, A

Beuchert, K

Bischoff, S

Blum, P

Braune, K

Bugg, DV

Case, T

Cramer, O

Crede, V

Crowe, KM

Degener, T

Djaoshvili, N

von Dombrowski, S

Doser, M

Dunnweber, W

Ehmanns, A

Engelhardt, D

Faessler, MA

Giarritta, P

Haddock, RP

Heinsius, FH

Heinzelmann, M

Herbstrith, A

Herz, M

Hessey, NP

Hidas, P

Hodd, C

Holtzhaussen, C

Huttmann, K

Jamnik, D

Kalinowsky, H

Kammle, B

Kammel, P

Kisiel, J

Klempt, E

Koch, H

Kolo, C

Kunze, M

Kurilla, U

Lakata, M

Landua, R

Matthay, H

McCrady, R

机构：

[1] Univ Karlsruhe, D-76021 Karlsruhe, Germany

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[3] Ruhr Univ Bochum, D-44780 Bochum, Germany

[4] Univ Bonn, D-53115 Bonn, Germany

[5] Hungarian Acad Sci, H-1525 Budapest, Hungary

[6] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[7] CERN, CH-1211 Geneva 4, Switzerland

[8] Univ Hamburg, D-22761 Hamburg, Germany

[9] Univ London Queen Mary & Westfield Coll, London E1 4NS, England

[10] Univ Calif Los Angeles, Los Angeles, CA 90024 USA

[11] Univ Munchen, D-80333 Munchen, Germany

[12] Univ Paris 06, LPNHE, F-75252 Paris, France

[13] Univ Paris 07, LPNHE, F-75252 Paris, France

[14] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[15] Ctr Rech Nucl, F-67037 Strasbourg, France

[16] Univ Zurich, CH-8057 Zurich, Switzerland

来源：

PHYSICS LETTERS B | 1998年 / 423卷 / 1-2期

基金：

匈牙利科学研究基金会;

关键词：

D O I：

10.1016/S0370-2693(98)00123-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

With antiprotons slopped in liquid deuterium, the <(p)over bar n> annihilation channel pi(-)pi(0) eta was studied using a final sample of 52 576 events obtained for a spectator proton momentum < 100 MeV/c. In the intensity distribution the eta pi P-wave is clearly apparent by its interferences with the dominant rho(-)(770) rind a(2)(1310) two-meson resonances. A partial wave analysis of the data yields evidence for resonant behaviour of the eta pi P-wave, which has the non-<q(q)over bar> quantum numbers I-G = 1(-), J(PC) = 1(-+). The extracted Breit-Wigner resonance parameters are m = (1400 +/- 20 +/- 20) MeV/c(2) and Gamma = (310 +/- 50(-30)(+50)) MeV/c(2). (C) 1998 Published by Elsevier Science B.V.

引用

页码：175 / 184

页数：10

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